Thesis - Measurement calibration-tuning & topology processin

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1、MEASUREMENTCALIBRATION/TUNING&TOPOLOGYPROCESSINGINPOWERSYSTEMSTATEESTIMATIONADissertationbySHANZHONGSubmittedtotheOfficeofGraduateStudiesofTexasA&MUniversityinpartialfulfillmentoftherequirementsforthedegreeofDOCTOROFPHILOSOPHYDecember2003MajorSubject:ElectricalEngineeringMEASUREMENTCALIBRA

2、TION/TUNING&TOPOLOGYPROCESSINGINPOWERSYSTEMSTATEESTIMATIONADissertationbySHANZHONGSubmittedtoTexasA&MUniversityinpartialfulfillmentoftherequirementsforthedegreeofDOCTOROFPHILOSOPHYApprovedastostyleandcontentby:____________________________________________________________________AliAburMlade

3、nKezunovic(ChairofCommittee)(Member)____________________________________________________________________DonR.HalversonVivekSarin(Member)(Member)__________________________________ChananSingh(HeadofDepartment)December2003MajorSubject:ElectricalEngineeringiiiABSTRACTMeasurementCalibration/Tun

4、ing&TopologyProcessinginPowerSystemStateEstimation.(December2003)ShanZhong,B.S.,HuazhongUniversityofScienceandTechnology,China;M.S.,TsinghuaUniversity,ChinaChairofAdvisoryCommittee:Dr.AliAburStateestimationplaysanimportantroleinmodernpowersystems.Theerrorsinthetelemeteredmeasurementsandthe

5、connectivityinformationofthenetworkwillgreatlycontaminatetheestimatedsystemstate.Thisdissertationprovidessolutionstosuppresstheinfluencesoftheseerrors.Atwo-stagestateestimationalgorithmhasbeenutilizedintopologyerroridentificationinthepastdecade.ChapterIIdiscussestheimplementationofthisalgo

6、rithm.Aconcisesubstationmodelisdefinedforthispurpose.Afriendlyuserinterfacethatincorporatesthetwo-stagealgorithmintotheconventionalstateestimatorisdeveloped.Theperformancesofthetwo-stagestateestimationalgorithmsrelyonaccuratedeterminationofsuspectsubstations.Acomprehensiveidentificationpro

7、cedureisdescribedinchapterIII.Inordertoevaluatetheproposedprocedure,atopologyerrorlibraryiscreated.Severalidentificationmethodsarecomparativelytestedusingthislibrary.AremotemeasurementcalibrationmethodispresentedinchapterIV.Theun-calibratedquantitiescanberelat